Have you ever had the feeling that there’s another you out there somewhere? That in a far mirrored universe there is another version of yourself.

The mirror universe is mostly interested in science fiction, but more than that, it has also been studied in theoretical cosmology, and with a new study on the Hubble constant, the mirror universe can no longer be just a fiction or “concept.”

(Photo: NASA/Getty Images)

399379 01: This undated artist’s impression shows what the very early Universe (less than 1 billion years old) might have looked like as it went through a voracious onset of star formation, transforming primordial hydrogen into countless stars at an unprecedented rate.

## “Cosmic Tension Problem”

The Hubble constant, often known as the Hubble parameter, it is a measurement of how fast our universe is expanding. Edwin Hubble was the first to create this expansion using data from Henrietta Leavitt, Vesto Slipher, and others.

Measurements of this expansion in the following decades were concluded at a speed of about 70 km/sec/Mpc. Astronomers expected different methods to agree on a single number as our measurements became more accurate over time, but this didn’t happen because the measurements have become so accurate in recent years that they now disagree. This is known as the cosmic stress problem, according to: Universe today†

As of now, the observed Hubble constants are divided into two groups. Measurements of microwave background cosmic fluctuations indicate a lower value of about 67 km/sec/Mpc, while studies of distant supernovae yield a higher value of about 73 km/sec/Mpc. Theoretical physicists are trying to understand why something isn’t right, and this is where the mirror universe could solve the problem.

The concept of the mirror universe was first explored in the 1990s to solve the matter-antimatter symmetry problem. In the lab we can make matter particles, but we can also make antimatter particles, and they are always supplied in pairs.

Therefore, a critical question arises: Where did all the antimatter siblings go when particles formed in the early stages of the universe?

This one new study explores how it can be used to solve the Hubble riddle.

**Also read: ****The best images from NASA’s Hubble Space Telescope for May 2022! **

## “A new idea”

The researchers discovered an invariance in unitless parameters. The fine structure constant, with a value of about 1/137, is the best known of these. Essentially, you can combine measurable parameters in such a way that all units cancel out, so you get the same number regardless of the units you choose, which is helpful for theorists. When cosmological models are adjusted to fit observed expansion rates, many parameters without unity remain the same, implying underlying cosmic symmetry.

According to Universe Today, if you apply this symmetry more generally, you can scale the rate of gravity free fall and the rate of photon-electron scattering to match Hubble’s measurement methods. If this immutability is true, it means that a mirror universe exists – a universe that would have a weak gravitational influence on our cosmos.

However, it should be noted that this research is largely a proof of concept. This means it only explains how cosmic invariance might help solve the Hubble constant problem, but it doesn’t prove it.

This requires a more comprehensive model, but in the meantime it’s a new idea that could broaden our understanding of the Hubble constant.

But for now, the mirror universe remains a fiction, a theory and a concept.

**Related article: ****Invisible Space Walls’ ‘Fifth Force’ Discovery Could Solve Cosmology’s Greatest Mystery**

*This article is owned by Tech Times*

*Written by Joaquin Victor Tacla*

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